Antimetastasis agent of malignant tumors

Abstract

An agent which is chemically stable, which prominently inhibits metastasis of malignant tumor and which is safe is disclosed. The antimetastasis agent of malignant tumors according to the present invention comprises as an effective ingredient beraprost or a pharmaceutically acceptable salt thereof.

We claim: 
     
       1. A method inhibiting a metastasis of a malignant tumor in a patient, the method comprising: administering to said patient an effective metastasis inhibiting amount of beraprost, or a stereoisomer thereof;   provided that said patient is selected from the group consisting of a human, a monkey, a dog and a mouse, and that said patient is suffering from said malignant tumor; and   provided that said malignant tumor is selected from the group consisting of a melanoma, lung cancer, stomach cancer, liver cancer, breast cancer, colon cancer, brain cancer, a neck cancer and a head cancer.   
     
     
       2. A method for inhibiting metastasis of a malignant tumor comprising administering an effective amount of beraprost to a patient suffering from the malignant tumor.